Repeating action for upright pianos.



N0. 682,6l6. Patented Supt. I7, I90]. J. HERRBURGER.

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UNITED I STATES PATENT OFFICE.

JOSEPH HERRBURGER, OF PARIS, FRANCE.

REPEATING ACTION FOR UPRIGHT PIANOS.

SPECIFICATION forming part of Letters Patent No. 682,616, datedSeptember 17, 1901.

Application filed April 2, 1901.

To all whom it may concern.-

Be it known that I, JOSEPH HERRBURGER, a citizen of France, and aresident of Paris, France, have invented certain new and usefulImprovements in Repeating Actions for Upright Pianos, of which thefollowing is a specification.

This invention relates to an action for upright pianos in which asuperior repeating effect is obtained.

In the accompanying drawings, Figure 1 is a side elevation, partly insection, of my im proved piano-action; and Fig. 2 is a longitudinalsection through the jack.

The letter a represents the key of an upright-piano action, I) thethrust-rod, c the Wippen, d thejack orhopper, and e the hammer, all asusual. Between the lower end of the jack and the wippen is placedaspringf, which tends to push the upper end of the jack under thehammer-butt 6 upon a release of the key. A second spring g is secured atone end to the hammer-butt e and engages at its other enda silk threadh, which is secured to the hammer-flange '6. This spring assists inthrowing the hammer against the hammer-rest j upon the release of thekey. A third spring 70 is coiled around a pin 70, that traverses a slotd of jack cl. The upper hooked end of this spring engages a thread Z,the other end of which is affixed to the hammer-butt e at 6 under theaxial center of the Serial No. 54,009.- (No model.)

hammer-shank. This thread passes through a perforation d of jack d.

The tension of spring 70 may be readily regiu lated by means of anadjusting screw m, that is tapped into the jack d and engages the tailend of the spring. The spring 7t has a tend ency to sustain the hammerin its half-stroke position after it has receded from the string andbefore the key is released. Thus the jack can readily return under thehammerbutt upon a partial or complete release of the key, and a veryreliable repeating action is thus insured. The very delicate adjustmentnecessary for this spring may be readily effected by means of theregulating-screw W.

What I claim is In a repeating action for upright pianos, thecombination of a jack having a pair of slots, with a spring'k, pivotedto the jack, means in the lower slot for regulating the tension of thespring, a string passing through the upper slot and connecting thespring to the hammer-butt, a spring g, secured to said hammer-butt, anda string h, for connecting said spring to the hammer-flange,substantially as specified.

Signed by me at Paris, France, this 13th day of March, 1901.

JOSEPH HERRBURGER.

Witnesses:

EDWARD P. MAOLEAN, AUGUSTE WYTE.

